As a sorcery, you may pay the mana cost of a locked door to unlock it.) Except for the stated exception, the token created by Mirror Room's ability copies exactly what was printed on the original creature and nothing else (unless that creature is copying something else or is a token
Mystic Remora has a much lower mana cost and is much harder for your opponents to play around, but it has that pesky cumulative upkeep cost
Where it really picks up is off the back of a Miraris Wake or another mana-doubler, turning Zacama into a veritable machine gun of damage and destroyed permanents
Meanwhile, you are able to tutor up a green, cheap, nonlegendary creature and toss it right onto the battlefield
This Lizard Assassin is really doing his best, and hes looking great doing it
Each level would add a static, triggered, or activated ability